Worcester 28i Junior - no signs of life!!!

My Worcester 28i Junior has stopped working. No lights are on, and there is no hot water or central heating. When i turn on the hot tap i think i can hear the fan start up (or is that just water running through the boiler?) but nothing else happens.

The mains switch on the wall is lit red so i assume that is fine. I've tried turning off the mains for several minutes to reset but still nothing.